Sources
1) Top left: Jacob Adenbaum`s @umn dissertation (2022)
2) Top right: Criscuolo et al (OCDE; 2023)
3) Bottom left: @thubbardkellogg and I @JLE (2009)
4) Bottom right: @HansbergRossi with Caliendo and Monte (JPE 2015)
🐦🔗: https://n.respublicae.eu/lugaricano/status/1622540471431049217